Answer:
The universe began, scientists believe, with every speck of its energy jammed into a very tiny point. This extremely dense point exploded with unimaginable force, creating matter and propelling it outward to make the billions of galaxies of our vast universe. Astrophysicists dubbed this titanic explosion the Big Bang.
Answer:
7500 m/s
Explanation:
We can use the equation velocity of a wave equals wavelength times frequency. Therefore, v = wavelength*f = (25 m)(300 Hz) = m/s7,500
Answer:
true
Explanation:
ionic compounds do not form molecules
Answer:
C 3.6 cm, 56 degrees North of the East axis
Explanation:
The two vectors are perpendicular to each other, so we can find the magnitude of their resultant simply by using the Pythagorean theorem:
where
A = 2.0 cm is the magnitude of the first vector
B = 3.0 cm is the magnitude of the second vector
Substituting,
Now we have to find the angle. If we measure the angle as North of East, the tangent of the angle is equal to the ratio between the component along North and the component along East. Therefore, in this case:
So, 56 degrees North of East.
<h3>Answer</h3><h3>option B</h3><h3>38 N</h3><h3>Explanation</h3>
Given that,
mass of block A = 14kg
mass of block B = 12kg
angle alpha equals = 19°
<h3>Formula to find tension in the wire connecting blocks A and B</h3>
Tension in wire connecting weight of object A and B is due to weight of block B
= mgsin19
due to slope we will take horizontal components of weight, mg
= 12(9.81)sin(19)
= 38.3